[BFG] Tray space

[minigiant]

So im starting an Imperial fleet at the same time as putting all my forces in cases to reduce space. I was wondering if anyone knew the minimum amout of slots the following take up in a GW army case

Battle cruiser
grand cruiser
escorts
bombers

Can you help?

[fracas]

i fit escorts into one space each
cut the foam to accommodate 1 plastic cruiser into 2 space (lengthwise)
BB or grand cruiser typically 3 space (widthwise)